Gate valves are widely used across many industries, commonly for wastewater and liquid gas. They are used primarily to cut off a pipeline when the sealing surface of the ram and valve seat is smooth and even. By relying on the top mold, spring, or ram, they can also prevent mediums from flowing through each other.

Product Description

Gate valves, as their name suggests, use a gate mechanism to open and close a valve. The gate moves perpendicularly to the direction of the medium. It cannot be adjusted or throttled, but only fully opened or fully closed. The gate has two sealing surfaces; the most commonly used gate valves form a wedge shape. The wedge angle varies with the valve parameters, usually 5,° and 2,° when the medium temperature is not high. The gate of the valve can be made into a whole; this configuration is called a rigid gate. Additionally, it can be made into a gate that can produce a small amount of deformation to improve its processability and make up for the deviation of the sealing surface angle during processing; this configuration is called a spring gate.

When the gate valve is closed, it can only be sealed by medium pressure, that is, the sealing surface of the gate is pressed against the valve seat on the other side with medium pressure to ensure the self-sealing of the sealing surface. Most gate valves are forcedly sealed; when the valve is closed, the gate is forced against the valve seat externally to ensure the tightness of the sealing surface. The gate of the valve then moves linearly with the valve stem and is called a lift lever gate or open lever gate valve. Usually, there is a trapezoidal thread on the lifting rod and the rotary motion changes to linear motion through the nut on the top of the valve and the guide groove on the valve body. Here, the operating torque changes to the operating thrust. When the valve is opened, the lift height of the gate is equal to 1:1 of the valve diameter. The fluid channel is completely clear; this position, however, cannot be monitored during operation. In actual use, the apex of the valve stem is used as a mark, which means it cannot be put into a fully open position. In to address the lock-up phenomenon caused by changes in temperature, it is usually opened to the top position, and then back to 1 / 2-1 circle as the position of the fully open valve. Therefore, the fully open position of the valve is determined by the position of the shutter or stroke. In some gate valve models, the stem nut is set on the gate plate. The hand heel then rotates to drive the valve stem to rotate, and the gate plate is raised.

Product Structure

Valve Selection Guide

Export Ball Valve, Knife Gate Valve, Ceramic Valve, Gate Valve